pyroxene

"The school science project involved identifying different rocks based on the minerals they contained, like quartz and feldspar. "

"My doctor recommended I take a calcium supplement to strengthen my bones. "

"Suzanne collected all the papers she had laid out."

"The family owns several, a small plot of land behind their house. "

"a blood sample"

"The box containing my old toys was stored in the attic. "

"The scientist used magnesium for the demonstration in the science lab. "

"The geologist studied the rocks in the park. "

"The group of students worked together on their project. "

"The sugar in the candy formed tiny, sparkling crystals. "

"The jeweler carefully inspected each crystalline before setting it in the ring. "

"Many rocks and minerals, like quartz and feldspar, are made of silicates. "